Initial evaluations on Madison Bumgarner, who suffered bruised ribs and a shoulder sprain last week in a dirt bike accident, are fairly positive, per Andrew Baggarly of the San Jose Mercury News (Twitter links). Bumgarner’s injured shoulder won’t require surgery and has calmed down to the point where he could begin rehab work on it in the next four to five days, Baggarly adds. While that all sounds encouraging, Bumgarner’s layoff will still be considerable; Baggarly notes that he could be ready to begin throwing off a mound in about two months’ time, and he’ll of course need to then build up enough arm strength to rejoin the rotation.